Messages in this thread | | | Date | Thu, 29 May 2003 12:38:49 -0700 | From | William Lee Irwin III <> | Subject | Re: list_head debugging patch |
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On Thursday 29 May 2003 15:08, William Lee Irwin III wrote: >> This appears to get the kernel to crap its pants in very, very >> short order. Given the number of things going wrong, I almost >> wonder if I did something wrong. Things get real ugly, really, >> really fast.
On Thu, May 29, 2003 at 09:22:43PM +0200, Morten Helgesen wrote: > [snip] > I gave this a go - booted without problems. I did some > untaring/copying/deleting and didn`t see anything unusual, but a > 'dbench 8' died right away. [...] > EIP is at clear_queue_congested+0x78/0xb0
clear_queue_congested() is doing an opportunistic check for list_empty() without taking a lock. The patch basically changes list_empty() to look at elements of the list instead of just pieces of the head. As opposed to auditing for this, could you remove the __list_head_check() from list_empty() and try again?
Thanks.
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